<form id=”billForm”>
<label for=”refNum”>Reference Number:</label>
<input type=”text” id=”refNum” required placeholder=”Enter 14 digit reference number”>
<button type=”button” onclick=”viewBill()”>View Bill</button>
</form>

<script>
function viewBill() {
var ref = document.getElementById(“refNum”).value;
if (ref) {
window.location.href = “https://bill.pitc.com.pk/generalbill/index?ref=” + ref;
}
}
</script>